Belt-drive



Q HTT&

BELT DRIVE APPLICATION TILED Aue.a0. |920.

1,383,850. Patented July 5, 1921.

INVENTOR @fm Y @2% ...Parser ceFFrCEf CLAUDE rrr'rs, or 'PAINTED ros'r,NEW Yoan, ,AssIeNoia 'ro rNerr:nsoLIQ-EAN13l COMPANY, or JERSEY4 CITY,NEW JEasEY, A cortroRA'rIoN or? NEWJERSEY.

:BnL'r-DRIvE.

Application filed August 30, '1920. Serial No(406,952.6.r

To all whom t may' concern.'

Beit known that I, CLAUDE Prr'rs, a citizen of the United States, andresident of Painted Post, county of Steuben, and State of New York, haveinvented a certain new and useful Improvement in Belt-Drives, of whichlthe following is a specification accompanied by drawings.

' This invention relates to a belt drive for power driven apparatus, butmore particularly to a short belt drive, when it is desired to locatevthe driving and driven elements near together.

It is often desirable to be able to use either a long drive or a shortdrive according to the conditions of operation, and one of theprincipalobjects of the present invention is to make such a change fromone drive tothe other conveniently and quickly possible with the sameapparatus, and by simple changes in connection with the driven element.Another object 0f the invention is to enable an-idler pulley frame for ashort belt drive to bev pivotally mounted upon the driven shaft carryingthe driven pulley so that the idler pullyacting` as a belt tightener,swings about the axis of rotation of the driven pulley.

A further object of the invention is to secure simple and readilyadjustable means for assembling the idler pulley frame and driven pulleyon the shaft with the driven pulley arranged between the arms of theframe so that the frame is pivoted on the driven shaft at each side ofthe said pulley.

To all of these ends the invention is shown in one of its preferredforms in the accompanying drawings in which Figure 1 is a diagrammatictop plan view partly in horizontal section on the line 1-1 of Fig. 2, ofan assembly of driving and driven elements and a short belt drive inaccordance with my invention, and

Fig. 2 is a detail side elevation of the drive showing a belt on thepulleys.

Referring to the drawings, A represents a base or bed plate having adriving element shown as a motor B mounted thereon provided with thedriving shaft C and the belt pulley D. A driven element shown in thisinstance as an air compressor E is also adapted to be mounted on thebase A in the usual manner as by means of the bolt holes F and suitablebase bolts (not shown) and the compressor is provided with the drivenshaft Gr.

iezaelitea` Jury 5, li921.

shaft Gr on which the driven pulley'IjHis adaptedto be mounted. In Fig.1 the driving and driven elements are shown in such relation, thatashort belt drive is provided between the driving and driven pulleys asindicatedin Fig. 2in which the belt J is shown passing over lthe pulleysand under the Yidler pulley K'which acts as a belt tightener ytortake'upslack in the belt.

Incase it'should be found' desirable to 'separate theV driving anddriven elements to a sufficient distance to require ja long belt drive,the idler pulley K and its mounting may ordinarily be omitted and aloose pulley `may be mounted on the driven shaftbeside the -drivenlpulley H, so that the belt may be shifted in the usual manner from onepulley to the otheras desired for driving thecompresser or forpermitting the driving element to rotate without driving the compressor.In such case the same driven'shaft G may be used if of suflicient lengthto vreceive the loose pulley and in accordance with my construction,either the vlong drive 'orthe' short drive may be used with, the samedriving' and driven'elements depending upon their distance apart, and Ihave shown the shaft G provided with a slot or key-way P adapted toreceivea key Q in this instance shown as a Woodruff key although anyother accepted device may be provided for making the driven pulley Hfast to the driven shaft.

In order to change from the long drive t0 the short drive I provide anidler pulley frame R preferably of forked construction having carryingthe idler pulley K, and the longery arms U and V provided with bearingp0rtions W and X preferably in the form of eyes or rings adapted to passover the driven The bore of the bearing portion X as shown issuficiently larger in diameter than the bore of the bearing portion W,to pass over the driven shaft and the key Q after the key is placed inthe shaft. This construction is provided in order that thel idler pulleyframe R with lthe driven pulley H arranged between the arms U and V maybe assembled on the driven shaft Gr after the said key Q has beeninserted in the keyway, P. In assemblin the short belt drive, the pulleyH is place between the arms U and V and these members are passed overthe shaft G into the position indicated in Fig. 1, A liner preferablyinthe form of a to aline the frame 'R on the driven shaft Gr- The shortbelt drive construction shown and described is simple, efficient, easilyassembled and disassembled and an additional advantage resides in thefact that the frame R for the outer pulley K is pvoted about Vthe sameaXis as that of the driven pulley which reduces the strain on the parts.

I Claim:

1. A short belt drive, comprising a driven shaft, a pulley adapted to bekeyed to said shaft, and anl idler pulley frame having arms providedwith bearing portions, the bore of'one bearing portion beingsufficiently larger than the other to pass over a key in the drivenshaft, whereby the idler pulley frame with the pulley arranged betweenthe arms thereof, may be assembled on the driven shaft after the saidkey has been inserted in the shaft.

2. A short belt drive, comprising a driven shaft a driven pulley adaptedto be secured tolrotate with said shaft, and an idler pulley framehaving arms provided with bearing portions in the form of eyes, the saididler pulley frame and driven pulley being adapted to be assembled fonthe shaft with the driven lpulley arranged between the arms of theframe, whereby thesaid frame is pivoted about the same axis as that ofthe driven pulley. y

`. In a short belt drive, the combination of a driving element having adriving shaft and a belt pulley, a driven element havingua driven shaftprovided with. a keyway and key, a pulley adapted to be keyed to saiddriven shaft, a forked frame carrying an idler pulley at one end andhaving arms provided with bearing portions in the form of eyes at theother end, one eye being of sufficiently larger bore than the other to pass over the key in the driven shaft, whereby the idler pulley framewith the driven pulley arranged between the arms thereof may beassembled on the driven shaft after the said key has been inserted inthe key-way.

4c. In a short belt drive, the combination l of a driving elementhaving-a driving shaft and a-belt pulley, a driven element having adriven shaft provided with a key-way and key, a pulley adapted to bekeyed to said driven shaft, a forked frame carrying an 'idler pulley atone end and having arms provided with bearing portions in the form ofeyes at the other end, one eye being of sufficiently larger bore thanthe other to pass over the key in the driven shaft, whereby the 'idlerpulley frame with the driven pulley arrangedbetween the arms thereof maybe assembled on the driven shaft after the said key has been inserted inthe key-way, and a liner in the formof t bearing sleeve adapted to beinserted within the said bearing specification. f

CLAUDE PIT'IS.

